12775377891650 has 48 divisors (see below), whose sum is σ = 25923930405120. Its totient is φ = 4645318257600.

The previous prime is 12775377891649. The next prime is 12775377891659. The reversal of 12775377891650 is 5619877357721.

It is not an unprimeable number, because it can be changed into a prime (12775377891659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8778287 + ... + 10129613.

It is an arithmetic number, because the mean of its divisors is an integer number (540081883440).

Almost surely, 2^{12775377891650} is an apocalyptic number.

12775377891650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12775377891650 is an abundant number, since it is smaller than the sum of its proper divisors (13148552513470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12775377891650 is a wasteful number, since it uses less digits than its factorization.

12775377891650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368539 (or 1368534 counting only the distinct ones).

The product of its (nonzero) digits is 155584800, while the sum is 68.

The spelling of 12775377891650 in words is "twelve trillion, seven hundred seventy-five billion, three hundred seventy-seven million, eight hundred ninety-one thousand, six hundred fifty".